EME227 Series Transverter Kits

EME227-13cm pre-amplifier
EME227 Transverter Kit

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EME227-13CM KIT Description:

The EME227-13CM is a High performance Transverter for the 2.4GHz 13cm band. The design uses low cost FR4 PC board material and takes around 6 hours to construct. The Transverter is designed as a transmit up, and receive down converter with a fixed frequency range of 2400 to 2483.5MHz,, and is suitable for either a 147 or 435MHz Transceiver. The frequency range cannot be changed to 2300MHz due to the use of SAW filters. A large number of SMD components are used to make the design compact in size, and reproducible in performance. Modern PHEMT devices along with SAW filters, a +7dBm Mixer and Gali amplifiers are used, and an onboard 5 watt dummy load and RF sensing is used to allow the direct connection of a 5Watt 147 or 435MHz Transceiver. The receiver uses an Broadcom / Avago MGA86563 PHEMT amplifier with a measured 2.5dB noise figure that is very good for terrestrial use, and a suitable mast mounted low noise preamplifier could be used if required. The transmit output uses a Gali-84 amplifier to provide a clean RF output of up to +19dBm at 2403MHz. Local oscillator rejection at either 1968 or 2256MHz is close to -50dBc

EME227-23CM KIT Description: NOT CURRENTLY AVAILABLE

There is also the possibility that the EME227 board could be used for a 3400MHz Transverter with a 432MHz I/F TBA

Kit Constructors Alert:

EME227-13cm

1/ There are no alerts for this Kit

EME227-13cm Kit Notes:

The pictures below show the basic constructed Transverer and the Kit construction notes and overlay diagrams should be carefully followed when constructing. For larger pictures to check orientation of some components click the images below. Construction is quite straight forward with no tuning required due to the use of SAW filters. The only adjustment required is the RX gain trim pot to suit the receiver being used, and the TX gain to set the required RF output on 2403MHz BUY THIS PRODUCT

EME227-13cm Top View
Top view of the EME227-13cm

The picture shows the basic EME227-13cm Kit with SMA connectors that have been used for low loss.

EME227-13cm Bottom View
Bottom view of the EME227-13cm

The picture shows the 5 Watt 51ohm resistor that is part of the attenuator when using up to 5 watts on either 147 or 435MHz.

EME227-13cm Performance Tests:

EME227-13cm-RXGAIN-S21
EME227-13cm S21 RX amplifier frequency response of the SAW filters and amplifier gain from the RX input to the mixer input. Add 10dB to the gain figures.
EME227-13cm-TXMIX-S21
EME227-13cm Plot showing the TX output from the mixer when using a 147MHz transceiver and 2256MHz L/O
EME227-13CM-TXOUT1-S21
EME227-13cm TX output from the Gali-84 showing the very good L/O rejection due to the SAW filters when using a 1128MHz EME193 PLL and EME228 multiplier

EME227-23cm Kit Notes: THIS KIT IS NOT CURRENTLY AVAILABLE

The pictures below show the basic constructed Transverer and the Kit construction notes and overlay diagrams should be carefully followed when constructing. For larger pictures to check orientation of some components click the images below.Construction is quite straight forward with no tuning required due to the use of SAW filters. The only adjustment required is the RX gain trim pot to suit the receiver being used, and the TX gain to set the required RF output on 1296MHz BUY THIS PRODUCT

EME227-23cm Top View
Top view of the EME227-23cm

The picture shows the basic EME227-23cm Kit with SMA connectors that have been used for low loss.

EME227-23cm Bottom View
Bottom view of the EME227-23cm

The picture shows the 5 Watt 51ohm resistor that is part of the attenuator when using up to 5 watts on 147MHz.

EME227-23cm Performance Tests: THIS KIT IS NOT CURRENTLY AVAILABLE UPDATE NEEDED BELOW
EME227-23cm-RXGAIN-S21
EME227-23cm S21 RX amplifier frequency response of the SAW filters and amplifier gain from the RX input to the mixer input. Add 10dB to the gain figures.
EME227-23cm-TXMIX-S21
EME227-23cm Plot showing the TX output from the mixer when using a 147MHz transceiver and 1156MHz L/O
EME227-23CM-TXOUT1-S21
EME227-23cm TX output from the Gali-84 showing the very good L/O rejection due to the SAW filters when using a 1156MHz EME193 PLL

Mounting into an Enclosure:

To be done

GME Enclosure 1
The EME227 board mounted in an Enclosure
EME227-ENC-1
The Enclosure has a locking Tab that holds the board firmly

Kit Changes and Repairs:

EME227-13CM

1/ There are no current changes to this Kit.

EME227-23CM

NOT CURRENTLY AVAILABLE